Cannot connect event callbacks to MagicFactory

As noticed by @uschmidt83, the @magic_factory decorator is not compatible with the current callback connection approach (widget.param.changed.connect). That’s a big bummer and needs to be fixed ASAP. One possibility would be to allow for MagicFactory to accept a widget_init function, that would be called with the widget instance each time a new one is created…

def init(widget):
    widget.x.changed.connect(print)

@magic_factory(init=init)
def func(x: int):
    ...

[uschmidt83]

…it will remember all of the kwargs passed to it, but also allow you to override them when you call the factory. …in which case the factory is a convenient way to create multiple widgets based on a single template…

That makes sense, thanks for the explanation. But it then probably needs some sort of init function as you suggested in the first post of this issue.

[tlambert03]

yeah, I’m thinking that’s a nice way to keep the functional interface. Will add it soon. Thanks for revealing the need!